A variable stiffness tuned mass inerter damper device for controlling vortex shedding and flutter of bridges

Abstract

The application discloses a variable stiffness tuned mass inertia damper device for controlling vortex vibration and flutter of a bridge, comprising a support structure arranged on the upper surface of a bottom plate, a lever rotatably arranged on the support structure, a second support member slidably arranged on the upper surface of the bottom plate, a flywheel rotatably arranged on the two ends of the second support member through a cylindrical rotating shaft, a mass block slidably arranged on the lever, an extension plate fixedly connected with the mass block, a first connecting belt and a second connecting belt. The variable stiffness tuned mass inertia damper device for controlling vortex vibration and flutter of a bridge provided by the application utilizes the amplification effect of the inertia container to reduce the stroke of the mass block, changes the relative position of the mass block to the rotating center point of the lever to realize semi-active adjustment of the frequency of the TMDI, changes the position of the lever support point relative to the center of the bridge, and then controls the vertical and torsional vibration of the bridge, thereby realizing the control of the vortex vibration or the flutter of the bridge.

Description

Technical Field

[0001] This invention relates to the field of bridge wind-induced vibration control devices, and more specifically, to a variable stiffness tuned mass inertia-compressive damping device for controlling bridge vortex-induced vibration and flutter. Background Technology

[0002] The wind resistance safety of bridges during their service life is crucial for ensuring structural reliability and operation. Long-span bridges, due to their gentle, low-frequency nature, are sensitive to wind loads and prone to wind-induced vibrations such as vortex-induced vibration and flutter. Flutter, in particular, can lead to dynamic instability and even the collapse of the entire structure, making it the most dangerous known form of wind-induced vibration in bridges. Large-amplitude vortex-induced vibration, coupled with vehicle-induced vibrations, can cause severe fatigue damage to structural components or significant functional problems. Therefore, there is an urgent need to develop damping devices to control vortex-induced vibration and flutter.

[0003] Tuned mass dampers (TMDs) are currently the most widely used type of damper, capable of suppressing vibrations at a specific frequency. Theoretical and experimental studies have shown that TMDs can not only control vortex-induced vibrations but also effectively increase the critical flutter wind speed of a structure and reduce the amplitude of the limiting cycle vibration after flutter. However, their biggest drawbacks are threefold: First, TMDs need to be installed on stiffening girders, and for the widely used flat steel box girder stiffening girders, the internal space is far from meeting the working stroke requirements of the tuned mass damper; second, TMDs have poor robustness, and when the frequency of the controlled system deviates from the design frequency of the tuned mass damper, the control effect is greatly reduced, essentially failing to suppress vibrations; third, the vibration control effect of the TMD on the controlled structure is directly proportional to the mass of the TMD. To ensure good control performance, the mass of the TMD generally needs to reach hundreds of tons, while TMDs are generally made of steel, which greatly increases the construction cost of bridges, and the installation and dismantling of TMDs are also quite difficult.

[0004] Currently, incorporating an inertial capacitive device with a "mass amplification effect" into a TMD (Tunable Mass Inertia Damper) to form a tuned mass inertia damper (TMDI) is a feasible method to reduce the physical mass of the TMD and solve the installation space problem. An inertial capacitive device is a mechanical device at both ends that resists the motion of the endpoints through a force proportional to the relative acceleration between the endpoints. The generated inertial force can be several orders of magnitude higher than the inertial force generated by the physical mass of the inertial device. However, like the TMD, the control effect of the TMDI is very sensitive to frequency. Once the actual frequency of the structure or the actual frequency of the TMDI deviates from the design frequency, the control effect of the TMDI decreases significantly, greatly limiting its application in practical engineering.

[0005] In conclusion, how to improve the robustness of TMDI is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a variable stiffness tuned mass inertial capacitive damping device for controlling bridge vortex-induced vibration and flutter. It can reduce the stroke of the mass block by utilizing the amplification effect of the inertial container, change the relative position of the mass block with respect to the rotation center point of the lever to achieve semi-active adjustment of the TMDI frequency, thereby improving the robustness of TMDI. At the same time, it can change the position of the lever support point relative to the bridge center for different control objectives, adjust the force of the system acting on the bridge, and thus control the vertical and torsional vibration of the bridge, thereby achieving control of bridge vortex-induced vibration or flutter.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A variable stiffness tuned mass inertia-compressive damping device for controlling bridge vortex-induced vibration and flutter includes:

[0009] A support structure is provided on the upper surface of the base plate of the controlled structure;

[0010] A lever, rotatably mounted on the support structure;

[0011] The second support member is a U-shaped structure and is slidably disposed on the upper surface of the base plate of the controlled structure.

[0012] Two flywheels are provided, and the two flywheels are rotatably located at the two ends of the second support member via a cylindrical shaft;

[0013] A mass block is slidably disposed on the lever;

[0014] An extension plate is disposed below the mass block and fixedly connected to the mass block;

[0015] The first connecting belt has its upper end connected to the mass block and its lower end fixedly connected to the cylindrical shaft and wrapped around the cylindrical shaft at least ten times.

[0016] The second connecting strip has its lower end connected to the extension plate and its upper end fixedly connected to the cylindrical shaft and wrapped around the cylindrical shaft at least ten times.

[0017] Preferably, the extension plate has an L-shaped structure, the first connecting strip is located in the middle of the cylindrical shaft, and there are two second connecting strips, which are respectively located on both sides of the first connecting strip and are symmetrical about the first connecting strip.

[0018] Preferably, the support structure includes a first support member and a rotating bearing, the rotating bearing having two rotatable ends, the two ends of the rotating bearing being respectively connected to the first support member and the lever.

[0019] Preferably, the upper surface of the controlled structure is provided with a column and a rotatable nut column. The outer periphery of the rotatable nut column is provided with threads. The column is a hollow tubular structure and has threads inside that match the rotatable nut column. The upper end of the rotatable nut column is detachably connected to one end of a spring, and the other end of the spring is detachably connected to the lever.

[0020] Preferably, the controlled structure is provided with two open slot guide rails, both of which are parallel to the lever. The lower end of the second support member is provided with a wheel assembly so that the second support member can slide along the extension direction of the open slot guide rail via the wheel assembly. The mass block is sleeved on the lever, and the wheel assembly is also provided between the mass block and the lever so that the mass block can slide along the lever. The upper ends of both sides of the open slot guide rail are provided with limiting protrusions, and the two limiting protrusions are used to prevent the wheel assembly from disengaging from the open slot guide rail.

[0021] Preferably, each end of the lever is provided with a motor device, and the mass block is provided with a cable. The motor device and the cable work together to drive the mass block to slide. The controlled structure is provided with two motor devices and the cable. The cable is arranged parallel to the lever. The motor device and the cable work together to drive the second support member to move.

[0022] Preferably, it further includes a control system, which is connected to the motor device and used to control the motor device to turn on or off.

[0023] Preferably, the system further includes a sensor connected to the control system. The sensor is installed on the bridge and used to detect vibration data of the bridge. The control system receives the detection results from the sensor and adjusts the motor device according to the detection results.

[0024] Preferably, the second support member is provided with a ball bearing, and the cylindrical shaft is located on the inner circumference of the ball bearing and can rotate around a fixed axis.

[0025] This invention provides a variable stiffness tuned mass inertial capacitive damping device for controlling bridge vortex-induced vibration and flutter. Utilizing the inertial amplification effect of the inertial container, the stroke of the mass block is significantly reduced. By adjusting the distance the mass block moves, its relative position to the lever's rotation center point can be changed, thereby achieving semi-active adjustment of the TMDI frequency. Simultaneously, for different control objectives, the position of the lever support point relative to the bridge center can be changed, adjusting the force acting on the bridge and thus controlling the bridge's vertical and torsional vibrations. This significantly improves the robustness of the TMDI and its practicality in engineering applications. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 A schematic diagram of the variable stiffness tuned mass inertia-compressive damping device for controlling bridge vortex-induced vibration and flutter provided by the present invention.

[0028] Figure 2 This is a schematic diagram of the structure of the extension plate, the first connecting strip, the second connecting strip and the cylindrical shaft assembly provided by the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of the second support member and ball bearing assembly provided by the present invention.

[0030] Figure 4 This is a schematic diagram of the wheel assembly and the slotted guide rail provided by the present invention.

[0031] Figure 5 This is a flowchart of the adaptive algorithm in the control system provided by the present invention.

[0032] Figure label:

[0033] 1-Controlled structure; 2-Mass block; 3-Column; 4-Rotating nut column; 5-Spring; 6-Lever; 7-Rotating bearing; 8-Motor device; 9-Control system; 10-Cable; 11-Wheel assembly; 12-Open slotted guide rail; 13-First connecting belt; 14-Second connecting belt; 15-Extension plate; 16-Flywheel; 17-Cylindrical shaft; 18-Ball bearing; 19-First support member; 20-Second support member; 21-Sensor. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] The core of this invention is to provide a variable stiffness tuned mass inertial-capacitive damping device for controlling bridge vortex-induced vibration and flutter. This variable stiffness tuned mass inertial-capacitive damping device can improve the robustness of TMDI.

[0036] It should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", and "rear" is based on the orientation or positional relationship shown in the accompanying drawings and is only for the purpose of facilitating the description of this application and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] This application provides a variable stiffness tuned mass inertia-capacitance damping device for controlling bridge vortex-induced vibration and flutter, comprising: a support structure, a lever 6, a second support member 20, a flywheel 16, a mass block 2, an extension plate 15, a first connector 13 and a second connector 14.

[0038] The supporting structure is used to be installed on the upper surface of the base plate of the controlled structure 1;

[0039] Lever 6 is rotatably mounted on the support structure;

[0040] The second support member 20 has a U-shaped structure and is slidably disposed on the upper surface of the base plate of the controlled structure 1.

[0041] Two flywheels 16 are provided, and the two flywheels 16 are rotatably provided at the two ends of the second support member 20 via a cylindrical shaft 17;

[0042] Mass block 2 is slidably mounted on lever 6;

[0043] The extension plate 15 is located below the mass block 2 and is fixedly connected to the mass block 2;

[0044] The first connecting belt 13 is connected to the mass block 2 at its upper end and is fixedly connected to the cylindrical shaft 17 at its lower end and is wrapped around the cylindrical shaft 17 at least ten times.

[0045] The second connecting strip 14 is connected at its lower end to the extension plate 15, and its upper end is fixedly connected to the cylindrical shaft 17 and wrapped around the cylindrical shaft 17 at least ten times.

[0046] Specifically, the controlled structure 1 includes a top plate and a bottom plate. In bridge engineering, the controlled structure 1 generally refers to the main beam cross-section of the bridge. The top plate and bottom plate refer to the upper and lower surfaces of the main beam cross-section, respectively. A support structure and a second support member 20 are provided at the upper end of the structure. The second support member 20 is a U-shaped member, and both ends of the second support member 20 are provided with rotatable flywheels 16. The second support member 20 can slide on the controlled structure 1 to adjust the position of the flywheels 16. A rotatable lever 6 is provided on the support structure. A mass block 2 that can slide along the lever 6 is provided on the lever 6. The lower end of the mass block 2 is connected to the extension plate 15, and the mass block 2 and the cylindrical shaft 17 are connected by a first connection. The first connecting belt 13 is wound around the cylindrical shaft 17 at least ten times. The extension plate 15 is connected to the cylindrical shaft 17 by the second connecting belt 14, which is also wound around the cylindrical shaft 17 at least ten times. The flywheel 16 should be made of a high-density material and should be designed with thick edges and thin middle to maximize the inertial amplification effect of the inertial container and provide a sufficiently large equivalent mass for the system. This will significantly reduce the static and dynamic displacement of the TMDI and provide better control. The flywheel 16 should be as close as possible to the lever 6 to ensure that the mass block 2 can move in more space without colliding with the flywheel 16.

[0047] It should be noted that by arranging the device of this application inside the main girder of the bridge, the device resonates with the bridge, absorbs structural energy, and dissipates it through its own damping, thereby controlling the vibration of the main girder. When the actual frequency of the bridge structure is consistent with the design frequency, and the main girder experiences vertical or torsional vibration, the main girder and the variable stiffness tuned mass inertial-compressive damping device resonate at the same frequency. The energy of the structure is transferred to the variable stiffness tuned mass inertial-compressive damper, causing the variable stiffness tuned mass inertial-compressive damper to move relative to the bridge. Through its own damping, it dissipates energy, achieving the effect of energy dissipation and vibration reduction.

[0048] Furthermore, the devices of this application should be arranged in pairs inside the main body of the bridge. By arranging two symmetrical variable stiffness tuned mass inertial-capacitive damping devices at the center of the main beam section, vertical vortex-induced vibration can be controlled. By arranging two symmetrical variable stiffness tuned mass inertial-capacitive damping devices at the left and right ends of the main beam section, torsional flutter or torsional vortex-induced vibration of the bridge can be controlled. Based on this, multiple variable stiffness tuned mass inertial-capacitive damping devices for controlling bridge vortex-induced vibration and flutter need to be set up and distributed at 1 / 2, 1 / 4 and 1 / 8 of the length of the main beam of the bridge, so as to achieve the control effect of first-order vortex-induced vibration, second-order vortex-induced vibration and third-order vortex-induced vibration.

[0049] Based on the above embodiment, the extension plate 15 has an L-shaped structure, the first connecting strip 13 is located in the middle of the cylindrical shaft 17, and there are two second connecting strips 14, which are respectively located on both sides of the first connecting strip 13 and are symmetrical about the first connecting strip 13.

[0050] Specifically, by using the first connecting belt 13 and the second connecting belt 14 to connect the cylindrical shaft 17 and the extension plate 15, it is ensured that when the L-shaped extension plate 15 moves up and down, the cylindrical shaft 17 will rotate along with it, ensuring that the inertial capacitance effect exists when the mass block 2 moves up and down. The two second connecting belts 14 are symmetrically arranged about the first connecting belt 13 so that the force on the cylindrical shaft 17 is uniform and can be maintained in a horizontal position. By connecting the first connecting belt 13 and the second connecting belt 14 to the cylindrical shaft 17 and the mass block 2, the up and down translation of the mass block 2 is converted into the rotation of the cylindrical shaft 17, effectively avoiding the high damping caused by friction or collision of gears and toothed plates or ball screws.

[0051] Optionally, the first connecting strip 13 and the second connecting strip 14 may be made of materials with good strength, rigidity and flexibility, such as nylon.

[0052] Optionally, if increased damping is required, additional dampers can be added as needed.

[0053] In some embodiments, the support structure includes a first support member 19 and a rotating bearing 7. The rotating bearing 7 includes two rotatable ends, and the two ends of the rotating bearing 7 are respectively connected to the first support member 19 and the lever 6.

[0054] Specifically, the first support member 19 is a columnar structure, and the first support member 19 is made of lightweight, pressure-resistant, and bending-resistant materials. The cross-sectional shape is not limited, but it is necessary to minimize its own weight while ensuring good pressure resistance and bending resistance. One end of the rotating bearing 7 is preferably fixed to the lever 6 by welding, and the other end is fixedly connected to the first support member 19, so that the lever 6 can rotate around the rotating bearing 7 at a certain angle.

[0055] Optionally, lever 6 is made of steel and its cross-sectional shape is not limited; it can be an I-shaped cross-section or a rectangular cross-section.

[0056] In some embodiments, the upper surface of the controlled structure 1 is provided with a column 3 and a rotatable nut column 4. The outer periphery of the rotatable nut column 4 is provided with threads. The column 3 is a hollow tubular structure, and the inside of the column 3 is provided with threads that match the rotatable nut column 4. The upper end of the rotatable nut column 4 is detachably connected to one end of the spring 5, and the other end of the spring 5 is detachably connected to the lever 6.

[0057] Specifically, the rotatable nut column 4 can control the length of its extension from the column 3 by rotation. In conjunction with the spring 5, it can control the initial state of the lever 6. Generally, it is recommended that the lever 6 be designed to be in a horizontal state to ensure convenient installation of the device and that the mass block 2 can move a larger stroke.

[0058] In some embodiments, the controlled structure 1 is provided with two open slot guide rails 12, both of which are parallel to the lever 6. The lower end of the second support member 20 is provided with a wheel assembly 11 so that the second support member 20 can slide along the extension direction of the open slot guide rail 12 via the wheel assembly 11. The mass block 2 is sleeved on the lever 6 and a wheel assembly 11 is also provided between the mass block 2 and the lever 6 so that the mass block 2 can slide along the lever 6. The upper ends of both sides of the open slot guide rail 12 are provided with limiting protrusions, which are used to prevent the wheel assembly 11 from disengaging from the open slot guide rail 12.

[0059] Specifically, the mass block 2 has an opening in the middle through which multiple wheels of the wheel assembly 11 are placed on the lever 6. The number of wheels is calculated based on the weight of the mass block 2. The size and material of the wheels are not limited; materials such as rubber and steel can be used. The lower end of the second support member 20 is also provided with a wheel assembly 11. The wheel assembly 11 works in conjunction with the open slot guide rail 12 to realize the movement of the second support member 20. The size of the opening of the open slot guide rail 12 varies with the size of the wheel assembly 11, and it should be ensured that the wheel assembly 11 will not be pulled upward out of the guide rail.

[0060] In some embodiments, motor devices 8 are provided at both ends of the lever 6, and a cable 10 is provided on the mass block 2. The motor devices 8 and the cable 10 work together to drive the mass block 2 to slide. The controlled structure 1 is provided with two motor devices 8 and cable 10. The cable 10 is arranged parallel to the lever 6. The motor devices 8 and the cable 10 work together to drive the second support member 20 to move.

[0061] Specifically, both the mass block 2 and the second support member 20 are equipped with cables 10, and two motor devices 8 are provided in the direction of movement of the mass block 2 and the second support member 20, respectively used to drive the mass block 2 or the second support member 20 to move in the forward or reverse direction.

[0062] Based on the above embodiments, a control system 9 is also included. The control system 9 is connected to the motor device 8 and is used to control the motor device 8 to turn on or off.

[0063] Specifically, the control system 9 performs unified regulation of the motor device 8 to achieve precise control of the position of the mass block 2 and the second support member 20, thereby reducing errors.

[0064] Based on the above embodiments, a sensor 21 is also included. The sensor 21 is connected to the control system 9. The sensor 21 is used to be installed on the bridge and to detect the vibration data of the bridge. The control system 9 is used to receive the detection results of the sensor 21 and to adjust the motor device 8 according to the detection results.

[0065] Specifically, sensor 21 is positioned at key locations on the bridge. Control system 9 receives and analyzes the data measured by the sensors. When the actual frequency of the bridge structure deviates from the design frequency, sensor 21 collects vibration data of the bridge and transmits it to the processing terminal. An adaptive feedforward control algorithm outputs commands to motor device 8 to pull the cable 10, further adjusting the position of mass block 2 to control the frequency of the variable stiffness tuned mass inertial capacitive damping device, causing the device to resonate with the bridge structure, thereby achieving the control effect of vortex-induced vibration and flutter. This invention is mainly used to control vortex-induced vibration and flutter, but it is not limited to these; it can also control other forms of large-amplitude vibration, such as wind-induced buffeting.

[0066] Based on the above embodiment, a ball bearing 18 is provided on the second support member 20, and a cylindrical shaft 17 is provided on the inner circumference of the ball bearing 18 and can rotate around a fixed axis.

[0067] Specifically, the cylindrical shaft 17 is made of lightweight, high-strength, smooth, and wear-resistant steel pipe. The diameter of the cylindrical shaft 17 is generally in the range of 5-50cm. The cylindrical shaft 17 and the inner ring of the ball bearing 18 are separated by balls. The balls should be as smooth as possible. The size and material of the balls can be freely selected as needed. A layer of lubricating oil can be applied to them periodically. As the mass block 2 moves, it drives the cylindrical shaft 17 to rotate, ensuring that the flywheel 16 can rotate coaxially with the cylindrical shaft 17.

[0068] In actual bridge engineering, the lever 6 essentially represents a stiffness amplification effect. The stiffness of the tension spring is k, and the equivalent stiffness of TMDI is N. 2 k and N are the ratios of the distance L1 from the leftmost end of lever 6 to the center of rotation of lever 6 and the distance L2 from mass block 2 to the center of rotation of lever 6. The equivalent stiffness of TMDI is N times the stiffness of the tension spring. 2 This multiple of N can reduce the static displacement of the TMDI tension spring, thus solving the installation space problem. Furthermore, the equivalent stiffness of the TMDI can be altered by changing the value of N, i.e., changing the distance from mass block 2 to the rotation center of lever 6, thus providing a new method for semi-active variable stiffness TMDI. The specific principle calculation formula is as follows:

[0069] (1)

[0070] In the formula: k is the stiffness of spring 5, L1 is the distance from the leftmost end of lever 6 to the center of rotation of lever 6, and L2 is the distance from mass block 2 to the center of rotation of lever 6. 'b' is the mass of TMDI mass block 2, and 'b' is the inertia coefficient of TMDI. It is the vibration frequency of TMDI.

[0071] Therefore, we can conclude that:

[0072] (2)

[0073] During the bridge design phase, when the wind speed is less than the target wind speed, the motion control equations of the bridge-nonlinear self-excited force model-TMDI system are established to satisfy the following objectives: the torsional amplitude of the main beam is less than the maximum allowable threshold under the flutter test wind speed, the TMDI stroke is less than the maximum allowable threshold, and the TMDI mass ratio and inertia-mass ratio are minimized. The optimal design parameters (TMDI mass, frequency, inertia capacity) database of TMDI under different structural design frequencies is established through the MOGBO multi-objective control algorithm, and the maximum allowable threshold of the vertical or torsional amplitude of the bridge is used as the feedforward signal for the design.

[0074] During the bridge operation phase, when the bridge experiences vortex-induced vibration or flutter, the semi-active lever-type TMDI device starts working. The bridge structural response is captured by sensors 21 placed at key locations on the bridge and transmitted to the control system 9 as an error signal. The pre-designed feedforward signal is input to the controller as a reference signal. Based on the reference signal and the error signal, the parameters of the adaptive filter are adjusted using the recursive least squares (RLS) control algorithm to minimize the error between the reference signal and the error signal. The output signal is then sent to the IIR adaptive filter to obtain the main frequency of the vibration response that needs to be controlled. The corresponding optimal design frequency of TMDI is found by linear interpolation in the pre-established database. The signal is converted into a signal of the motor device 8 using equation (2). The motor device 8 moves the mass block 2 to the designated position by the cable 10, thereby realizing the semi-active variable stiffness tuned mass inertial container for vortex-induced vibration and flutter control.

[0075] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0076] The above provides a detailed description of a variable stiffness tuned mass inertia-capacitive damping device for controlling bridge vortex-induced vibration and flutter, as provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the invention. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A variable stiffness tuned mass inertia-compressive damping device for controlling bridge vortex-induced vibration and flutter, characterized in that, include: A support structure is provided on the upper surface of the base plate of the controlled structure (1); Lever (6), rotatably disposed on the support structure; The second support member (20) is a U-shaped structure. The second support member (20) is slidably provided on the upper surface of the bottom plate of the controlled structure (1). Two flywheels (16) are provided, and the two flywheels (16) are rotatably provided at the two ends of the second support member (20) via a cylindrical shaft (17); Mass block (2) is slidably disposed on the lever (6); An extension plate (15) is provided below the mass block (2) and is fixedly connected to the mass block (2); The first connecting belt (13) is connected at its upper end to the mass block (2) and at its lower end is fixedly connected to the cylindrical shaft (17) and wrapped around the cylindrical shaft (17) at least ten times. The second connecting strip (14) has its lower end connected to the extension plate (15) and its upper end fixedly connected to the cylindrical shaft (17) and wrapped around the cylindrical shaft (17) at least ten times. The controlled structure (1) is provided with two open slot guide rails (12), both of which are parallel to the lever (6). The lower end of the second support member (20) is provided with a wheel assembly (11) so that the second support member (20) can slide along the extension direction of the open slot guide rail (12) via the wheel assembly (11). The mass block (2) is sleeved on the lever (6) and the wheel assembly (11) is also provided between the mass block (2) and the lever (6) so that the mass block (2) can slide along the lever (6). The upper ends of both sides of the open slot guide rail (12) are provided with limiting protrusions. The two limiting protrusions are used to prevent the wheel assembly (11) from disengaging from the open slot guide rail (12).

2. The variable stiffness tuned mass inertia-compressive damping device for controlling bridge vortex-induced vibration and flutter according to claim 1, characterized in that, The extension plate (15) has an L-shaped structure. The first connecting strip (13) is located in the middle of the cylindrical shaft (17). There are two second connecting strips (14), and the two second connecting strips (14) are respectively located on both sides of the first connecting strip (13) and are symmetrical about the first connecting strip (13).

3. The variable stiffness tuned mass inertia-compressive damping device for controlling bridge vortex-induced vibration and flutter according to claim 1, characterized in that, The support structure includes a first support member (19) and a rotating bearing (7). The rotating bearing (7) includes two rotatable ends, and the two ends of the rotating bearing (7) are respectively connected to the first support member (19) and the lever (6).

4. The variable stiffness tuned mass inertia-compressive damping device for controlling bridge vortex-induced vibration and flutter according to claim 1, characterized in that, The upper surface of the controlled structure (1) is provided with a column (3) and a rotatable nut column (4). The outer periphery of the rotatable nut column (4) is provided with threads. The column (3) is a hollow tubular structure, and the inside of the column (3) is provided with threads that match the rotatable nut column (4). The upper end of the rotatable nut column (4) is detachably connected to one end of the spring (5), and the other end of the spring (5) is detachably connected to the lever (6).

5. The variable stiffness tuned mass inertia-compressive damping device for controlling bridge vortex-induced vibration and flutter according to claim 1, characterized in that, Both ends of the lever (6) are provided with motor devices (8), and the mass block (2) is provided with a cable (10). The motor device (8) and the cable (10) work together to drive the mass block (2) to slide. The controlled structure (1) is provided with two motor devices (8) and the cable (10). The cable (10) is arranged parallel to the lever (6). The motor device (8) and the cable (10) work together to drive the second support member (20) to move.

6. The variable stiffness tuned mass inertia-compressive damping device for controlling bridge vortex-induced vibration and flutter according to claim 5, characterized in that, It also includes a control system (9), which is connected to the motor device (8) and is used to control the motor device (8) to turn on or off.

7. The variable stiffness tuned mass inertia-compressive damping device for controlling bridge vortex-induced vibration and flutter according to claim 6, characterized in that, It also includes a sensor (21) connected to the control system (9). The sensor (21) is used to be installed on the bridge and to detect the vibration data of the bridge. The control system (9) is used to receive the detection results of the sensor (21) and to adjust the motor device (8) according to the detection results.

8. The variable stiffness tuned mass inertia-compressive damping device for controlling bridge vortex-induced vibration and flutter according to any one of claims 1 to 7, characterized in that, The second support member (20) is provided with a ball bearing (18), and the cylindrical shaft (17) is located on the inner circumference of the ball bearing (18) and can rotate around a fixed axis.

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